Rubber heel



D. D. GRANGER.

RUBBER HEEL. APPLICATION FILED FEB. 4. 1919.

Patented Aug. 26, 191%).

INVENTOR DANUS D. GRANGER, OF NEW LONDON, OHIO.

RUBBER HEEL.

flatness.

Specification of Letters Patent. Patented Aug, 2%, 1919,

Application filed February 4, 1819. Serial No.'274,894'.

To all whom may concern.-

Be it known that I, DANUS D. GRANGER,

. a citizen of the United States, residing at New London, in the county of Huron and- State of Ohio, have invented a new and Improved Rubber Heel, of which the following is' a specification.

My invention has for its object to provide an improved rubber heel of a simple and inexpensive construction and whose upper and lower faces are especially designed to co operate for effecting a more positive te-ndency of the heel to adhere to the shoe and the lower or tread face to effect a sure grip,

when brought into engagement with the ground, while walkin My invention also has for its purpose to provide a rubber heel having upper and lower suction surfaces that coact in such manner, whereby to produce opposite pulling actions on the said two faces, as the lower or'tread face tends to more firmly adhere to the ground, when lifting the foot and increase suction action created on the upper face that causes the said upper face to the more effectively adhere to the shoe to 'which it is attached.

scription, specifically pointed out in cheap-1 pended claims and illustrated in the accompanying drawings, in which:

Figure 1 is an inverted plan view of a rubber heel constructed in accordance with my invention. I

F ig. 2 is a longitudinal section thereof taken on the line 22 on Fig. 1.

' Fig. 3 is a top plan view of my said improved rubber heel.

4 is a cross section thereof on the line iii: on Fig. I Fig. 5 is a top plan View of a um'idificd construction of my improved rub'licr incl,

. 6-6 on Fig. '5.

Fig. 6 isa cross section thereofon the line In carrying out. my invention, the heel body is of the conventional external contour and is formed of that grade of rubber of A which rubber heels are usually com 'ioscd.

In my construction of heel and in 'theprcferrcd form thereof, the upper and lower faces of the heel are each provided with suction surfaces or elements that work together, that is the suction action imparted to i the lower face 1 as the foot is lifted during walking, increases the suction. at the upper face 2,in the manner presently more fully explained.

'20 In my improved form of rubber hecl, the

bottom or lower face has suction elements that consist of a series of ring-like concavities 3that surround a center concavity 4.

The several ring-like concavitics il are P, separated, at the tread surface, by flat tread portions whose peripheral edges terminate in undercut portions 6 instead of straight edges, the reason for which .is cxplained as follows:

By making-the said edges or portions 6 undercut or projected at an acute angle inwardly relatively to the tread face of the heel, as is best shown in Figs. 2, 3 and 4-,

it follows that as the heel wears down, the

said ring-lil c tread surfaces 5 substantially maintain their original narrow width and the suction concavities'theirtfull width, such arrangement of parts proyiding, as it were,

an increased life of the suction elements on the tread and thereby maintain, for a long time during the use of the heel, the full effect of the said suction elements.

7 designates a reinforce tread portion at the extreme rear end of the heel whose face is in a plane somewhat below the tread face that has the suction elements, it being understood that the said portion 7 serves the usual function of preventing'a too rapid wearing heel.

As before stated, both the upper and lower faces of the heel have suction surfaces or elements that cooperate, as will be now explained.

The upper face 2 of the heel has a central concavity 20 whose outer edges 8 taper and merge with a bearing surface 9 that extends entirely around the concavity 20 and which tat-urinates in substantially straight edges 1 down of the rear extremity of the '100 that constitute one wall of a surrounding channel or groove 11, whose other wall merges with an outer fiat bearing surface 12 which extends entirely around the sides,

. front and rear portions of the heel, as is best shown in Fig;

By forming the upper face of the shoe, as shown and described, the central concavity 20 and the outer channel 11 act as suction elements which aid in holding the heel to the shoe sole, when it is attached thereto by nailing in the usual manner, it being apparent that when walking, as the suction elements on the bottom of the heel cause the heel to grip or adhere to the ground, such pulling action as is applied at the bottom of the heel tends to pull the heel away from the shoe and, in doing so, it increases the action of the suction elements 20 and 11 and thereby causes the heel to hold tighter to the shoe.

In my construction of heel, instead of providing a separate washer for cooperating with each nail head, as is usually the case in the formation of rubber heels, a flat plate 13 is embedded in the heel body and the said plate has a series of apertures ll that aline apertures 15-15 which extend through the heel and through which fastening nails (not shown) are passed, when securing the heel to-the shoe.

By using a single plate, as stated, simplifies and cheapens the .means for securing the heel to the shoe, since the one plate acts as a Washer for all of the nails and provides for attaching the heel with a less number of nails than is necessary when using a separate washer for each nail.

Figs. 5 and 6 illustrate. a modified construction of myimproved heel. In this form, instead of providing the upper face of the heel with'suction elements, the said face is constructed for cushioning the heel and for such purpose, the said upper face is provided with an annular depression or channel 16 that surrounds a central annular bearing surface 17 which, in turn, surrounds a central concavity 18 that connects with the outer channel 16, by one or more passages 2'222.

The outer channel 16 communicates with one or more air passages 2323 that open through the back (if the heel, as shown.

When formed with a cushioning means at is provided with suction elements, as in Figs,

1, 2, 3 and 4, it being understood that when using the modified form of heel, Figs. 5 and I 6, the air is pumped into the channels 16 and 18, when lifting the heel off the ground and expelled during the treading action.

From the foregoing description taken in connection with the drawings, the complete construction and the advantages of my improved rubber heel will be readily apparent and need not be further referred to.

lVhat I claim is:

l. A rubber heel having a tread portion provided with suction elements that consist of a series of annular concavities and a ringlike tread portion between each pair of c0ncavities, the outer peripheral walls of the said ring-like portions beingundercut or inclined inwardly.

2. A rubber heel having a tread portion provided with suction elements that consist of a series of annular concavities and a ringvlike tread portion between each pair of concavities, the outer peripheral walls. of the said ring-like portions beinfi; undercut 'and inclined inwardly. the up er parts of the extremities of the concarfities over-lying the undercut edges of the ring-like tread portions.

A rubber heel having a lower or tread portion provided with suction elem nts that. consist of a series of annular concavitics and a ring-like tread portion between each pair of concavities, the outer periphe al walls of the said ring-like tread portions being undercut or inclined inwardly. said heel having an upper face ,provided with a central suction concavity and a suction groove or channel surrounding the central concavity and located near the outer edge of the heel.

i. A rubber heel having an upper face provided with a central suction concavity and a suction groove or channel surrounding the central concavity and located near thc outer edge of the heel. 

